Marginella. MOLLUSCA. SOLENOSTOMATA. 335 



MARGINELLADiE. 



Gen. LXVIII. MARGINELLA— Spire short ; outer lip 

 with an external border ; pillar folds equal ; no hd. 



300. M. voluta. — Whorls two, greenish, the outer lip white. 



Cyprsea voluta, Mont. Test. Brit. 203. t. vi. f. 7 Voluta laevis, Do7i. 



Brit. Shells, t. clxv. — Inhabits deep water, rare. 

 Length about half an inch, subconical, strong, smooth ; aperture linear ; 

 both lips denticulated ; pillar subplicated. The Bulla diaphana of Montagu, 

 Test. Brit. 225. t. vii. f. 8. is regarded as the young of this species. 



Gen. COLOMBELLA. — Aperture oblique ; outer lip with 

 an internal callus contracting the cavity ; pillar plaited ; no 

 lid. 



1. C. Bartonends — Shell oval, contracted close to the beak, strongly reti- 

 culated ; whorls about four or five, the last about two-thirds the length of 

 the shell ; aperture elongated, curved, acute at both ends ; right hand lip ex- 

 panded, undulated, toothed within ; left-hand lip smooth at the edge, toothed 

 within — Murex Bart. Sower. Min. Conch, t. xxxiv. lower figures. — Landon 

 Clay. 



2. C. ventncosa. — Subovate, inflated, transversely striated ; spu-e short 

 pointed, base notched ; three sharp plaits upon the pillar ; body -lip callous.— 

 Auricula vent. Sower. Min. Conch. 405. f. 1 — In the Crag at Ipswich. 



3. C. buccinea. — Subovate inflated, smooth; spire short, acute; base notch- 

 ed ; three sharp plaits upon the pillar ; left lip callous ; right lip with a thick 



border — Auricula buc. Sower. Min. Conch, t. cccclxv. f. 2 In the Crag at 



Ramsholt. 



OLIVAD.^. 



Gen. OLIVA. — Shell subcyhndrical ; aperture longitudinal, 

 emarginate ; separating line canahculated, by the inflection 

 of the edge of the last whorl. 



1. O. Branderi. — Ovate, pointed, smooth ; spire prominent, last whorl con- 

 vex ; mouth oblong ; right lip thickened. — (Voluta Ispidula, Brander, Foss. 

 f. 72.) Sower. Min. Conch, t. cclxxxviii. upper figure. — Londoti Clay. 



2. O. Salisbimana. — Subfusiform, short, ventricose, smooth ; mouth oblong, 

 both lips tumid above. — Sower. Min. Conch, t. cclxxxviii. lower figures. — 

 London Clay. 



